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Best 4 Stroke Dirt Bike Oil

Best 4 Stroke Dirt Bike Oil

What are the Top Dirt Bike Oil Brands for 4 Stroke Motors?

Like any other high-operational machine, a dirt-bike requires frequent mechanical service to work at its full speed. During maintenance, you should use the recommended oil when servicing different bike parts.

However, you’ll find so many varieties of dirt bike oil when purchasing lubricants that you might even get confused and pick the wrong lubricator.

Dirt bike enthusiasts should analyze their markets and scrutinize each type of oil with performance to determine the right ones to purchase. If you understand all your needs precisely, you’ll quickly pinpoint the designs that will work best for your bike.

Picking the wrong oil can significantly interfere with your dirt bike’s lifespan, so don’t confuse a four-stroke oil with a two-stroke lubricant. Four-stroke engine dirt bikes’ requirements surpass those of two-stroke locomotives because of the former’s ingrained design.

For example, when racing at high speed, the temperatures of four-stroke engines can reach up to 265 F. Besides, four-stroke designs need quality oil for the lubrication of valve trains and clutches.

It would be best to refer to the instructions manual provided with the bike for essential details when dealing with different lubricants. We generally recommend various weight lubricators for four-strokes and injector oils for two-stroke bikes.

We researched and enlisted five of the best engine oils for 4-stroke bikes. Check your dirt bike guide for compatibility before using any lubricant on your machine. In case of uncertainty, feel free to consult your local dealer for clarification.

If you don’t have a 4 Stroke bike, check out the page on the Best 2 Stroke Dirt Bike Engine Oil.


Many motorcyclists with four-stroke bikes prefer the Castrol Power1 synthetic lubricant over any other. The dirt bike oil delivers lucid emissions because of its 100% synthetic composition.

Riders who desire environment-friendly options for their dirt bikes should go for Castrol. The lubricant also complies with all regulations set out by API SL (rating).

If you continuously race your bike at high speeds, get yourself the Castrol lubricant because it warrants faster acceleration over a short distance and time. Forget bumpy starts; the lubricant’s design can fully cater to speedy bikes with four-stroke engines.

Castrol also works best in carburetors and fuel-infused engines owing to its versatility. The oil delivers exceptional performance for powerful dirt bikes and works particularly well with motorbikes relying on turbochargers.

The oil features a sophisticated technology known as the Trizone automation that protects the gearbox, engine, and clutch from disintegration.

Trizone will protect your motor parts from untimely corrosion because the technology inhibits the collection of lacquer, sludge, and carbon residues. Castrol motor oil facilitates a smooth switching of gears because it improves clutch slip-up control.


  • The motor oil retains viscosity in both extreme and favorable weather. Castrol oil won’t change its state even when under mechanical pressure, as the lubricant delivers reliable performance in all circumstances.
  • The Castrol lubricant works seamlessly with Japanese and European dirt bikes.
  • Trizone technologies protect the three critical parts of your dirt bike: the clutch, gearbox, and engine.
  • Race-derived automation warrants maximum acceleration from the engine.


  • Some customers complained about the poor quality and outdated API rating of the oil.


Valvoline manufacturers integrated the patented formulations of superior base lubricants with premium additive technologies to guarantee riders top performance when they ride their dirt bikes.

Valvoline oil’s unique viscosity keeps it in liquid form and prevents the lubricant from breaking down, especially in extreme temperatures.

Manufacturers designed Valvoline to reduce friction between mechanical parts. A Valvoline lubricator will ensure the smooth changing of gears and preserve the functioning of the wet-clutch.

The additional blending of the oil with special cleansing agents prevents the engine’s degradation by eliminating residues and keeping the motor parts clean.

Valvoline oil protects the engine from corrosion and because it contains silicone preservatives that prevent foaming by maintaining the required lubing film.


  • The improved anti-shudder feature ensures maximum transfer of power and the smooth alternation of gears.
  • Anti-wear technologies enhance the seamless transmission of energy while ensuring the durability of mechanical components.
  • Oil flows smoothly and in perpetual liquid form, thanks to the proprietary and unique blend of premium oils and refined additives that keep the oil films working in both cold and hot temperatures.


  • One quart of Valvoline oil costs about twenty dollars. Some customers find the pricing absurd.


If you need a stable and reliable engine oil for your four-stroke dirt bike, look no further than the Maxima Premium4 oil that assures buyers of prolonged engine life.

Riders demand a lot from their four-stroke dirt bikes in terms of performance. Maxima oils contain unique formulations of anti-scruff preservatives that work unbothered in the extreme temperatures of powerful and highly demanding engines.

Manufacturers blend the petroleum-based oil with anti-shear and anti-wear supplements. Even when under mechanical pressure, Maxima oils guarantee optimum performance and reliability.

Maxima oils work perfectly in both air-cooled and water-cooled engines. We recommend dirt bike owners to apply the oil on wet clutches because it warrants the rider a sleek start when powering up the machine.

Young or new riders who hardly run regular maintenance routines on their bikes should opt for Maxima because the oil remains clean for an extended period and delivers supreme performance even with consistent racing or riding.

For a rewarding experience with Maxima, follow the manufacturers’ instructions in the guide issued alongside your dirt bike during purchase.


  • Manufacturers prepare the oil explicitly for wet-clutches. Maxima oil minimizes friction, reduces temperatures within the engine, and makes starting the dirt bike less bumpy.
  • Anti-scruff supplements in the formula reduce extreme temperatures and improve performance in powerful engines.
  • The oil comes from premium petroleum and warrants both stability and lifelong performance of dirt bike motors.
  • The Turbo certification indicates a superior mark of quality.


  • The clutch can easily slip when using the Maxima lubricant on your bike.
  • Maxima oil works on specific types of dirt bikes and not all of them. Make sure you check your dirt bike instructions manual for the best oil for your motorcycle.
  • The oil takes up to three long weeks to arrive after ordering.


Quicksilver designs high-quality products that live up to their customer specifications on performance. The brand produces reliable engine oil that will suit different marine engines, regardless of the motor brand.

Each product that bears the Quicksilver emblem passes through a rigorous validation exercise usually enforced by an institution that constructs marine motors.

The clean lubricant minimizes friction and pollution to the environment. Besides, Quicksilver oil prevents the damage and corrosion of internal parts to warrant long engine life.

Quicksilver carried out numerous tests on the marine lubricant to improve its effectiveness against wear and corrosion.

The brand beats other brands to deliver quality accessories, engine oils, and parts to different clients worldwide. Customers trust the brand because of its meticulous, repetitive testing, as well as quality assurance.


  • Manufacturers designed Quicksilver oil to protect mechanical parts from extreme wear and corrosion.
  • For a long time, the oil stays viscous, enhances the engines’ working capability, and works perfectly on four-stroke maritime motors.
  • Quicksilver ensures that all customers receive their deliveries on time, regardless of the locations.
  • Many boat owners find this oil affordable; the Quicksilver oil also works for a long time.


  • Quicksilver oils work best for specific marine designs but poorly in others. Please ensure that you understand all your motor’s needs and the right type of oil required to keep your engines in good working condition.


The Kawasaki four-stroke motor oil guarantees reliability in developing a powerful engine. The oil contains superior elements that mitigate the corroding effect of time and frequent riding by keeping the engine walls clean at all times.

Your motor engine will run correctly and for a long duration because the oil regularly cleanses the mechanical sections to ward off any performance inhibitors.

Dirt bike riders will enjoy switching gears without any disturbances, thanks to the improved transmission and enhanced clutch execution that comes with applying the lubricant.

If you use the Kawasaki oil on your engine, your bike will become more dependable and reliable for ages to come. I would recommend applying the oil in maintenance applications that require JASO MA2, JASO MA, and API SL engine oils.


  • Kawasaki manufacturers designed Kawasaki oils specifically for Kawasaki bikes. Aside from greasing Kawasaki dirt bikes, the oil works perfectly in conventional engines like Ninja 300 and Ninja 650 editions.
  • Kawasaki Oil guarantees long-term performance. You can replace the Kawasaki engine oil after every two to four thousand miles.
  • After applying the Kawasaki conventional oil, you will notice an improved transmission when shifting gears and enjoy a cleaner engine with clear and safe emissions.
  • Your engine will gain a prolonged lifespan when you use the Kawasaki motor oil.


  • Some buyers think the oil costs a little more than a synthetic lubricant.

How to understand your oils and pick the best options

Engine oils often get confusing due to the different types of lubricants available in markets. Applying the wrong grease on your motorbike can hamper the functionality of the engine in the future.

Most of the oil types you’ll come across will bear 10W-40, 5W-40, or 10W-30 stickers on their containers.

The number 10 represents the temperature at which the oil will work most favorably. W indicates the winter season. Therefore, the oil will work favorably under ten degrees Celsius in winter. The number 30 or 40 reveals how thick the lubricant will get inside a running engine.

An oil with a higher number will quickly become thick when surrounded by heat. Manufacturers designed 10W-40 oils specifically for dirt bikes and motorcycles because they take good care of the clutch, engine, and conveyance.

The excellent viscosity of the engine oil enables it to keep the engine safe in different heat conditions. 10W-40 oils also lubricate the inner parts of the motor and improve the performance of your engine.

5W-40 engine oils work perfectly in many high-end engine models like racing cars.

Why and how frequently should you change your oil?

Dirt bike oils collect residues that accumulate after the combustion in your engine. Other pollutants also find their way into the engine through the air filter. Changing your oil will eliminate the toxic waste that can affect motor performance if left to pile.

You should change your oil every six to ten hours or otherwise, as stated by the manufacturer.

The oil retention capacity of your engine

Most dirt bikes can hold between 500-850ml of oil. However, the volume each engine can contain depends on the model, make, and manufacture year of your dirt bike.

Can two-stroke oil work in a four-stroke engine?

Four-stroke motors operate under extreme temperatures. The engines require oils with high adhesiveness to maintain performance, especially in racing competitions. Two-stroke oils will not handle the performance conditions in four-stroke engines.


Always stick to recommended oils and designs that work to your bike’s advantage. Please don’t pick a cheap lubricant because you believe it will save you a few bucks. Go for quality and reliability by picking a renowned brand with the best offer for your engine.

Besides keeping your engine clean, the right oil will give your motor a longer lifespan and improve the engine’s overall transmission to all other mechanical parts of the dirt bike.

Remember to check your instruction manual for manufacturers’ guidelines regarding the right oil to use for your bike. Four-stroke engines require high-quality lubricants to retain performance so, choose wisely.

We advise dirt bike owners to pick the Valvoline engine oil. The lubricator contains cleaning additives that effectively get rid of cumulative precipitation within the engine.

Valvoline will keep friction to a minimum, allow the smooth switching of gears, and keep the engine in optimum working order regardless of the weather mood.

Experienced riders advise new dirt bike owners to choose Valvoline because it keeps engines running for many years without interfering with the ordinary motor functionality.

Despite its costliness, the oil gives you good value for money and works pretty well on different dirt bike models. I would recommend the lubricant to any rider concerned with keeping their rides aloft in performance and condition.



Geralt Revi was born into motocross. His father raced anything with an engine so naturally, Geralt followed in his footsteps. He loves all things racing like his father, but took a special interest in Dirt Biking at a young age and from there it has blossomed into a love over the years. Getting out on the dirt track is therapeutic for Geralt and loves sharing what he has learned over the years with others.

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